US5203063A - Device for mounting and dismounting shaft furnace tymps - Google Patents

Device for mounting and dismounting shaft furnace tymps Download PDF

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Publication number
US5203063A
US5203063A US07/716,728 US71672891A US5203063A US 5203063 A US5203063 A US 5203063A US 71672891 A US71672891 A US 71672891A US 5203063 A US5203063 A US 5203063A
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United States
Prior art keywords
claws
yoke
rod
bushing
tymp
Prior art date
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Expired - Fee Related
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US07/716,728
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English (en)
Inventor
Nicolas Bonani
Edmond Mainz
Edouard Sand
Ernest Sand
Nicolas Wintersdorf
Michel Lux
Francis Gross
Victor Hutmacher
Patrick Peiffer
Pierre Mailliet
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Paul Wurth SA
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Paul Wurth SA
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Assigned to PAUL WURTH S.A. A CORP. OF LUXEMBOURG reassignment PAUL WURTH S.A. A CORP. OF LUXEMBOURG ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BONANI, NICOLAS, GROSS, FRANCIS, HUTMACHER, VICTOR, LUX, MICHEL, MAINZ, EDMOND, PEIFFER, PATRICK, SAND, EDOUARD, ESCH/, SAND, ERNEST, WINTERSDORF, NICOLAS, MAILLIET, PIERRE
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/16—Arrangements of tuyeres
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/16—Tuyéres
    • C21B7/166—Tuyere replacement apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53796—Puller or pusher means, contained force multiplying operator
    • Y10T29/53835—Puller or pusher means, contained force multiplying operator having wedge operator
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53796—Puller or pusher means, contained force multiplying operator
    • Y10T29/53848—Puller or pusher means, contained force multiplying operator having screw operator
    • Y10T29/53857—Central screw, work-engagers around screw
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53796—Puller or pusher means, contained force multiplying operator
    • Y10T29/53848—Puller or pusher means, contained force multiplying operator having screw operator
    • Y10T29/53857—Central screw, work-engagers around screw
    • Y10T29/53861—Work-engager arms along or parallel to screw

Definitions

  • the present invention relates to a device for mounting and dismounting shaft furnace tymps.
  • shaft furnaces in particular blast furnaces, are supplied with hot air and with liquid or solid fuels through a circular tuyere fitting in the region of the furnace hearth.
  • These tuyeres are held in place by a tymp accommodated in the interior of the furnace wall, these tymps being extended towards the outside of the wall by a tuyere arch fixed to the outer metal armour of the furnace.
  • the tuyere arches are generally made of steel, while the tymps and the tuyeres are made of copper.
  • the tymps and the tuyeres are, furthermore, water cooled by virtue of a double frustroconical wall.
  • the dismounting of a tuyere which extends beyond the inner side of the furnace wall, generally does not present any particular problems
  • the dismounting of a tymp is generally a much more difficult operation in view of the fact that the tymp is not only wedged onto the inner seat of the tuyere arch but, in addition, is embedded in the refractory material of the furnace wall, the weight and, if necessary, any relative movement of which it also has to withstand.
  • the dismounting of a tymp has generally been carried out by a manual service crew, composed of five or six workmen, who try to free the tymp from its seat with the aid of long metal hooks gripping behind the inner edge of the tymp when the tuyere has been disengaged.
  • a manual service crew composed of five or six workmen, who try to free the tymp from its seat with the aid of long metal hooks gripping behind the inner edge of the tymp when the tuyere has been disengaged.
  • a trick consisting of interrupting the circulation of cooling water in the tymp so a to allow it to heat up, due to the heat from the bast furnace wall, beyond the temperature to which it is normally exposed.
  • EP Patent Application No. 90,123,485, corresponding to U.S. Pat. No. 5,127,633, 90,124,485 proposed a device for mounting or dismounting shaft furnace tuyeres or tymps.
  • This is a relatively complex machine provided with a gripper capable of grasping both the tuyere and the tymp and enabling these parts to be freed from their seat without manual force.
  • This gripper is controlled with the aide of a hydraulic unit capable of actuating two telescopic elements of the gripper in opposite directions, as a result of which the hydraulic unit has to be especially designed for this purpose, thereby making the machine relatively complicated and expensive.
  • the object of the present invention is to provide a simple device for freeing and dismounting the tymps, which can be actuated by conventional and standard means.
  • the device proposed by the present invention includes a gripper with retractable claws for engaging through the tymp and control means which pass through the gripper and can be controlled from outside in order to spread or retract the claws radially with respect to the axis of the tymp.
  • the gripper and its control means are carried by a yoke designed to be fitted onto the outer edge of the tuyere arch and to be associated with a known pneumatic explosive-actuated tool which can be fitted to the outside of the yoke, either onto extensions of the claws or onto their control means, in order to exert, by its rotation and its bearing on the yoke, a tractive force on the claws of the gripper.
  • the device proposed by the present invention is extremely simple. After removing the elements of the blast connection which direct hot air into the tuyere, the device, preferably mounted on a suitable frame, is moved with the aid of a lift truck so as to be on the same axis as the tymp and is advanced along this axis in order to engage the gripper, in the open position, that is to say with retracted claws, through the tymp until the yoke bears on the circular edge of the tuyere arch and to which it may possible by fixed with the aid of clamping screws. The gripper is then opened with the aid of its control means until the hooks are secured behind the inner edge of the tymp.
  • the yoke is perferably a multi-branch yoke having three branches which extend radially from the hub of the yoke at intervals of 120°.
  • the gripper therefore also has three claws associated with the three branches of the yoke and each provided, on the inner side, with a hook which can be secured behind the inner edge of the tymp.
  • the device proposed by the invention it is possible to remove the tymps of a blast furnace without great manual effort, and above all, without danger to the service crew. Furthermore, the tymps, freed and removed with the aid of this device, are never damaged during extraction, so that they can be reused provided that they have not been damaged in other ways during use.
  • the device can be controlled easily by two workmen, instead of five to six for a manual intervention. The length of time for the intervention is also reduced to a time which, on the one hand, is practically invariable for removing a tymp and which, on the other hand, is not more than one hour, so that the interruption of the blast furnace production is reduced to a minimum.
  • the invention also proposes different embodiments for controlling the gripper and the explosive-actuated tool.
  • each claw opposite the hooks is articulated on a tension device through which passes a threaded rod, accommodated in the corresponding branch of the yoke, without the possibility of axial displacement but with the possibility of rotation under the action of an explosive-actuated tool which can be connected to a polygonal head of the rod.
  • the means for controlling the gripper have, according to a first embodiment, a wedge consisting of three inclined ramps extending radially from an axial control rod and diverging towards the inner end of the gripper, each ramp comprising means for guiding a cam, which is integral with each of the claws, in order to cause a radial spreading or retraction of the latter depending on the direction of axial displacement of the control rod.
  • the control rod can consist of two telescopic parts which penetrate into one another by way of internal and external threads respectively, the part carrying the control wedge of the gripper being fixed in terms of rotation and axially displaceable, the other being accommodated in the hub of the yoke so as to be axially immobilized but with the possibility of rotation by virtue of an outer polygonal head which can be actuated by an explosive-actuated tool.
  • the three claws are respectively accommodated between three pairs of lugs which converge in accordance with the conicity of the tymp and are fixed longitudinally to an end plate carried by the inner end of a bushing which is axially displaceable through the hub of the yoke, but locked in terms of rotation with respect to the latter.
  • the claws bear, by way of their end, on the yoke side, on the said end plate of the bushing and are, by way of their opposite inner end, radially spreadable and retractable under the action of an axial displacement of a control rod passing coaxially through the gripper and the bushing, this rod being axially displaceable with respect to the bushing, but locked in terms of rotation with respect to the latter.
  • the spreading of the three claws can be ensured by three convex spring blades provided on a sleeve fixed to the control rod, while the of the claws counter to the action of the spring blades can be effected by cams provided on this sleeve and associated with oblique ramps on the claws and under the action of an axial driving-in of the control rod inside the tymp.
  • Each claw is then also axially displaceable within the bounds of stops provided on the corresponding lugs.
  • each claw can be articulated on an extension passing through the corresponding branch of the yoke and to the threaded end of which an explosive-actuated tool can be connected via a mandrel which can bear on the branch of the yoke.
  • the gripper can be actuated with the aid of a tubular control sleeve comprising an external thread cooperating, on the outer side of the yoke, with an internal thread of the bushing and an internal thread cooperating with an external thread of the end of the control rod passing axially through the bushing, the external and internal threads of the sleeve being right-handed and left-handed respectively, in order to displace the bushing and the control rod in opposite directions by the same operation.
  • This operation can be effected manually with the aid of a retractable handle engaged on the control sleeve.
  • a mandrel comprising a cylindrical hood engaged around the control sleeve in order to bear on the hub, this mandrel being extended outward by means of a rotary adaptor comprising an internal screw thread in order to be screwed onto the external thread of the control rod of the gripper and a female axial polygonal connector in order to be coupled to the explosive-actuated tool.
  • a tubular control sleeve comprising an external thread cooperating, on the outer side of the yoke, with an internal thread of the hub of the yoke and an internal thread cooperating with an external thread of the bushing in order to displace the latter in the axial direction.
  • These external and internal threads of the sleeve can also be of opposite threading.
  • the explosive-actuated tool can be connected to the control rod via a mandrel screwed onto the external thread of the end of the rod and comprising a female axial polygonal connector in order to be coupled to the explosive-actuated tool, the latter, by bearing on the sleeve by way of the mandrel, serving both for opening and closing the gripper, and for extracting the tymp.
  • this rod preferably has a spherical articulation with a limited angular play in order to compensate for any decentering of the device or of the tymp.
  • FIG. 1 illustrates diagrammatically a section through a hearth wall of a blast furnace with the opening for accommodating the tymp.
  • FIG. 2 shows a diagrammatic longitudinal axial section through a first embodiment of the device according to the present invention.
  • FIG. 3 illustrates diagrammatically the details of the device for controlling the gripper.
  • FIG. 4 is a front view of the yoke after its installation on the tuyere arch.
  • FIG. 5 shows diagrammatically a longitudinal section of a second embodiment.
  • FIG. 5(a) illustrates the details of the articulation in the control rod.
  • FIG. 6 shows diagrammatically a longitudinal section of a third embodiment.
  • FIG. 7 illustrates details of the gripper.
  • FIG. 8 illustrates a front view of the yoke.
  • FIG. 9 illustrates a variant of the embodiment of FIG. 6.
  • FIGS. 10 and 11 illustrate a longitudinal section of a fourth embodiment of a device according to the present invention, with the gripper closed and the gripper open respectively.
  • FIG. 1 illustrates diagrammatically the general environment in which the device proposed by the present invention is required to work.
  • the hot air intended to be injected into a shaft furnace is drawn off from a circular pipe 10 passing round the lower part of the furnace and is conveyed through blast connections 12 towards a tuyere fitting 16 in order to be injected into the furnace.
  • the nozzle 14 bears on a front, generally spherical, seat with which the tuyere 16 is provided.
  • the tuyere arch 24, the tymp 26 and the tuyere 16 all have a frustroconical shape and are nested telescopically in one another.
  • FIG. 2 shows the most simplified version of a device for extracting the tymp 26.
  • the figure illustrates this device in the operative position for extraction, after prior disengagement of the tuyere.
  • the device shown in FIG. 2 comprises three essential parts, namely a multi-branch yoke 30 as support for the functional elements, which are a gripper and the means for controlling the latter.
  • the yoke 30 consists simply of three branches 32 extending radially from the hub 34 and forming equal angles of 120° between them.
  • the ends of the branches 32 can be provided, on their inner face, with shoes 36 in order to bear on the circular edge of the tuyere arch 24.
  • the branches 32 can also have means enabling the yoke to be fixed to the edge of the tuyere arch 24. Furthermore, the branches 32 can be extensive in order to be able to be fitted to tuyere arches of different diameter.
  • the embodiment of FIG. 2 essentially has three linkages, only one of which is shown at 38.
  • the latter each comprise an inner part formed by a rod 40 terminating in a hook 42, the three rods 40 in fact constituting the claws and a gripper 44.
  • the outer part of the links 38 is essentially formed by a traction screw 46 terminating on the outside of the yoke 30 in a square head 48 which permits the rotation of the traction screw 46.
  • the connection between the traction screw 46 and the claw 40 is constituted in the form of a tension device 50 joined to the claw 40 by an articulation.
  • the tension device 50 has a nut 52 with a counter thread through which the traction screw 46 passes.
  • each tension device 50 is preferably accommodated in a protective case 58 fastened to the branch 32 of the yoke 30.
  • control wedge 60 carried by an axial control rod 62.
  • This control rod 62 consists of two interpenetrable telescopic parts, namely a hollow rod 64 and a threaded rod 66 which is accommodated axially in the hub 34 of the yoke 30 and the inner threaded part of which cooperates with a corresponding internal thread of the hollow rod 64, or more simply with a counternut 68 welded to the end of a hollow rod 64.
  • the other end of the threaded rod 66 possesses, like the traction screws 46, on the other side of the yoke 30, a square head and, similarly, is immobilized axially in the yoke 30 by stops 70. Consequently, a rotation of the rod 66 causes an axial displacement of the hollow rod 64 in one direction or the other depending on the direction of rotation.
  • the functions of the rods 64 and 66 can be reversed, that is to say that the rod 64 is solid and penetrates into the hollow of a rod 66 due to the rotation of the latter.
  • a person skilled in the art will be able to provide other equally simple means to ensure the axial displacement of the part 64 of the control rod 62.
  • the control wedge 60 can consist (also see FIG. 3), in this simplest version, of three ramps 72 fixed radially to the inner end of the rod 64 and diverging from the latter towards each of the claws 40, in order to form a general configuration in the form of a tripod.
  • Each of the hooks 42 is provided, in its inner corner, with a finger or a cam 74 which is guided along the inner edge of the corresponding ramp 72.
  • the maximum diameter of the control wedge 60 must, of course, be less than the smallest section of the tymp 26 in order to permit the installation of the device.
  • the yoke 80 likewise has three branches 82 extending radially from the hub 84 of the yoke 80.
  • the ends of the branches 82 are provided with anchoring bolts 86 enabling the yoke to be anchored on the edge of the tuyere arch 24.
  • These anchoring bolts 86 are preferably displaceable in radial grooves 88 of the branches 82 in order to compensate for any deformations of the tuyere arch or to be fitted to tuyere arches of different sizes.
  • FIG. 5 illustrates a first embodiment installed on the tuyere arch 24 and supported on a frame 90 transportable with the aid of a fork-lift 91.
  • the invention advocates, for the embodiment of FIG. 5 and for those of the following figures, a more advanced gripper 92 of the type described in European Patent Application No. 90124485.
  • this gripper is described in detail in the above mentioned document, it will only be described briefly in the context of the present application, the reader being invited to refer to the above mentioned document for further details.
  • the gripper 92 thus has three claws 94 equipped with an inner hook and positioned around an axial control rod 96, opposite the branches 82 of the yoke 80.
  • Each of the claws 94 is accommodated inside a pair of lugs, only one of which is shown at 98 in the figures.
  • These lugs 98 of substantially triangular shape, converge longitudinally in accordance with the conicity of the tymp 26 are fixed to a diametral end plate 100.
  • the claws 94 bear, between the adjacent lugs 98, by way of their outer part, on the peripheral edge of the end plate 100.
  • the six lugs 98 are also fastened to a circular collar 102 intended to bear on the outer edge of the tymp 26.
  • the claws 94 In the open position of the gripper 92 (see FIG. 7), the claws 94 have a certain freedom of axial movement limited, on the one hand, by a shoulder 104 facing the end plate 100 and, on the other hand, by stops 106, 108 provided on the claws 94 and the adjacent lugs 98 respectively.
  • the inner part of the control rod 96 is surrounded by a coaxial cylindrical sleeve 110 held in place, on one side, by a flange 112 of the rod 96 and, on the opposite side, at the end of the rod 96 by a radial end plate 114 fixed to this rod.
  • the sleeve 110 carries three pairs of radial flanks 116, only one of the latter being shown in the figures, the positions of which correspond to those of the lugs 98 and which flank the inner part of each of the claws 94.
  • a floating spring blade 118 Located in each of the three spaces defined by each pair of flanks 116, the axial edge of the claws 94, the sleeve 110 and also the flange 112, and the end plate 114 is a floating spring blade 118, the elasticity of which tends to render it convex as shown in FIG. 5.
  • an oblique cam 120 Located on each of the flanks 116 is, furthermore, an oblique cam 120 intended to cooperate with an oblique ramp 122 provided on each lateral side of the claws 94 and formed by an enlargement of the inner end of the latter.
  • FIGS. 5 and 6 illustrate the gripper 92 in the fully closed position, the tymp 26 being wedged between the collar 102, on the one hand, and each of the hooks of the claws 94, on the other hand.
  • the control rod 96 is displaced axially, in one of the ways explained in greater detail below, towards the right in the figures, the end plate 100 with its collar 102 and the lugs 98 remaining in place.
  • the inner end of the claws 94 is first released from the grasp o the end plate 114, while the cams 120 come closer to the ramps 122 of each of the claws.
  • the claws 94 From the moment when the cams 120 come into contact with the ramps 122, the claws 94, by virtue of a certain axial and radial freedom, are likewise carried along toward the right in the figures, under the effect of the thrust of the cams 120, until their axial movement is arrested upon the mutual contact of the stops 106 and 108. By virtue of this axial translation, the claws 94 are disengaged from the inner face of the tymp 26.
  • the continuation of the axial movement of the control rod 96 toward the right in the figures make the cams 120 act on the inclined ramps 122 in view of the fact that the claws are not blocked by the stops 108. This causes, as illustrated in FIG.
  • the closure of the gripper 92 comprises the same sequences in reverse over.
  • the control rod 96 is displaced toward the left from the position of FIG. 7.
  • This movement causes the disengagement of the cams 120 from the inclined ramps 122 of the claws 94 in order to release the latter upon the action of the spring blades 118.
  • the elastic deformation of these blades 118 towards the positions of FIGS. 5 and 6 and the continuation of the movement of the control rod toward the left causes a sliding of the claws 94 under the action of the end plate 114 as far as the position of FIGS. 5 and 6, according to which the gripper is closed and holds tymp 26 between the collar 1202 and the tools of the claws 94.
  • FIGS. 5 and 6 are the same as regards the axial control of the rod 96.
  • This rod 96 passes coaxially rough a cylindrical bushing 130 which carries at its inner end the end plate 100.
  • the rod 96 can slide axially with respect to the bushing 130 but is immobilized in terms of rotation with respect to the latter by virtue of a key 132.
  • the bushing 130 for its part, is accommodated in the hub 84 of the yoke 80 so as to be able to slide therein in the axial direction, while at the same time being blocked in the rotary direction by virtue of another key 134.
  • the axial displacement of the rod 96 is initiated by virtue of a tubular control sleeve 136.
  • the latter has an external thread 138 by which it is screwed into a corresponding internal thread of the front part of the bushing 130.
  • the sleeve 136 also has an internal thread 140 which fits a corresponding external thread around the end of the rod 96 emerging from the bushing 130.
  • One of the threads 138 or 140 is right handed, while the other of the threads 140 or 138 is left handed.
  • the said bushing has a tendency to remain immobilized, while the rod 96 is displaced at an axial speed twice as high as that of the control sleeve 136.
  • the control rod 96 is displaced, by counter reaction, by a distance twice as great toward the right, as can be seen by comparing FIG. 6 with FIG. 7.
  • Such a movement consequently causes the opening of the gripper.
  • the closure of the gripper 92 is of course effected in the same way by turning the sleeve 136 in the opposite direction.
  • control rod 96 In view of the fact that, in the embodiments of FIGS. 5 onwards, the control rod 96 is guided in the bushing 130, it does not permit, in contrast to the embodiment of FIG. 2, compensation for this misalignments or irregularities of positioning of the yoke. For this reason, an articulation 150, shown in greater detail in FIGS. 5 (a), has been provided in the rod 96.
  • the control rod is in two parts 96(a), 96(b) which meet along a spherical articulation surface defined by a convex face of one of the parts 96(b) and a complementary concave part of the other part 96(a) of the rod 96.
  • the stability and the junction of the two parts 96 (a) and 96 (b) is ensured by a belt 152, an axial opening 154 of which is larger than the corresponding part 96 (a) so as to allow an annular play 156 to remain.
  • one of the parts 96 (b) or 96 (a) can be subjected, with respect to the other part 96(a) or 96(b), to a misalignment within a solid angle ⁇ .
  • This angular mobility permits the compensation of any irregularity or misalignment o the tymp 26 or of the extraction device and consequently ensures correct positioning of the gripper with respect to the tymp 26.
  • each of the claws 94 is articulated, on the outer side, on an extension 160 which passes through the corresponding branch 82 of the yoke 80.
  • the end of this extension 160 is provided with a screw thread on which a pneumatic explosive-actuated tool 162 is engaged via a mandrel 164.
  • the mandrel 164 Under the action of this explosive-actuated tool 162, the mandrel 164 is induced to screw onto the extension 160, but, retained by a bearing surface 166 provided of r this purpose on the branch 82, it exerts a corresponding tractive force on the extension 160 and on the claw 94.
  • the other two claws (not shown) are acted upon successively in the same way until the tymp 26 is released, which is made possible by axial sliding of the bushing 130 in the hub 84 under the thrust of the tymp 26 on the collar 102.
  • the complete device including the tymp 26 held in the closed gripper 92, can be extracted from the tuyere arch, after releasing the bolts 86 of the yoke 80, by reversing the lift truck on which the frame 90 is located.
  • the tymp 26 is freed from its seat on the tuyere arch 24 by acting on the control arm 96.
  • a slightly modified support frame 170 is used which permits the installation of a pneumatic explosive-actuated tool 172 in axial alignment on the control rod 96.
  • This explosive-actuated tool 172 is likewise a conventional explosive-actuated tool which is commercially available and sufficiently powerful for the requirements in questions. It can be connected to the end of the control arm 96 via a mandrel 174 after lifting the handle 142.
  • This mandrel 174 has a cylindrical hood 182 which can be engaged around the sleeve 136 in order to bear on the hub 84 of the yoke 80.
  • the mandrel 174 also has a rotary adapter 176 joined to the hood 182 via a rolling bearing 178.
  • the adapter 176 has, in the hollow of the hold 182, an axial opening with a screw thread designed to be screwed onto the threaded end of the control rod 96.
  • a polygonal female connector 180 permits connection to the explosive-actuate tool 172.
  • FIG. 9 shows a variant of the embodiment of FIG. 6, the frame 170 being replaced by a trolley 186 which runs on rails (not shown) and is suspended below the circular hot blast main which exists around certain blast furnaces in order to support a blast connection dismounting machine.
  • the tymp-extraction device which is exactly the same as that of FIG. 6, is carried in a cradle 188 mounted on the trolley 186 and the inclination of which is adjustable by means of a double adjusting nut 190.
  • FIGS. 10 and 11 show another embodiment, showing the gripper 92 in the closed position and in the open position respectively.
  • the control of the gripper in contrast, is different.
  • the opening and closure of the gripper 92 are likewise effected with the aid of a control rod 200 axially displaceable in a bushing 202 which, in turn, is axially displaceable in the hub 204 of the yoke 80. Both the control rod 200 and the bushing 202 are immobilized in terms of rotation with the aid of keys.
  • control sleeve 206 does not act on the control rod 200 which passes freely through a central opening of the sleeve 206.
  • the latter likewise possesses an internal and external thread, but these cooperate with an external thread of the bushing 202 and an internal thread of the hub 204 respectively.
  • the control sleeve 206 serves only to displace the bushing 202 axially so as to close the gripper 92 from the rear, by the collar 102 bearing on the outer edge of the tymp 26.
  • the sleeve likewise has opposite external and internal threads so that when the sleeve 206 is screwed into the hub 204, the bushing 202 is subjected to an axial displacement which is twice as great with respect to the hub 204 in the same direction.
  • control rod 200 is directly actuated with the aid of a conventional explosive-actuated tool 210 via a mandrel 212 which possesses an internal screw thread enabling it to be screwed onto a thread 214 at the end of the rod 200 and a polygonal female connector enabling it to be directly fitted onto the explosive-actuated tool 210.
  • the explosive actuated tool and the tymp-extraction device are likewise supported by a frame 216.
  • the device In order to dismount a tymp 26, the device is brought into the position of FIG. 11 with the aid of a lift truck 218 until the collar 102 of the gripper 92 is bearing on the outer edge of the tymp 26.
  • the adjusting bolts 86 of the yoke 80 are then tightened onto the explosive-actuated tool 210.
  • the explosive-actuated tool and the tymp-extraction device are likewise supported by a frame 216.
  • the sleeve 206 is then actuated in the direction corresponding to a displacement of the bushing 202 towards the left by a distance of the order of a few millimeters, sufficient to release the outer edge of the tymp 26 from the grasp of the collar 102.
  • the explosive-actuated tool 210 is then actuated in order to turn the mandrel 212 which, by its bearing on the sleeve 206 and its rotation, exerts an axial tractive force on the rod 200. This movement causes the closure of the gripper 92 and, from the closure of the explosive-actuated tool 210 frees the tymp 26 from its seat, under the effect of the traction on the rod 200.

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  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Earth Drilling (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Clamps And Clips (AREA)
  • Golf Clubs (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Braking Arrangements (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Gripping On Spindles (AREA)
  • Automatic Assembly (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
US07/716,728 1990-06-29 1991-06-17 Device for mounting and dismounting shaft furnace tymps Expired - Fee Related US5203063A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU87758 1990-06-29
LU87758A LU87758A1 (fr) 1990-06-29 1990-06-29 Appareil pour l'extraction des tympes des hauts fourneaux

Publications (1)

Publication Number Publication Date
US5203063A true US5203063A (en) 1993-04-20

Family

ID=19731243

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/716,728 Expired - Fee Related US5203063A (en) 1990-06-29 1991-06-17 Device for mounting and dismounting shaft furnace tymps

Country Status (10)

Country Link
US (1) US5203063A (de)
EP (1) EP0464419B1 (de)
AT (1) ATE127161T1 (de)
AU (1) AU639800B2 (de)
BR (1) BR9102778A (de)
CA (1) CA2045915C (de)
DE (1) DE69112509T2 (de)
ES (1) ES2078996T3 (de)
LU (1) LU87758A1 (de)
ZA (1) ZA914578B (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5333378A (en) * 1991-01-02 1994-08-02 Sjoebom Boerje Method for pulling bearings, a bearing puller and use thereof
US6141868A (en) * 1998-01-07 2000-11-07 Intri-Plex Technologies, Inc. Apparatus for press-in attachment of suspension assembly in hard disk drive
WO2008011694A1 (en) * 2006-07-24 2008-01-31 Gerdau Açominas S/A Tooling for changing tuyères and cooling boxes
US9486902B1 (en) * 2014-04-01 2016-11-08 Alexander K. Miller Tool for pulling impeller wear ring
CN106636512A (zh) * 2017-02-15 2017-05-10 中冶南方工程技术有限公司 风口小套拆卸机构及其拆卸方法
CN106636511A (zh) * 2017-02-15 2017-05-10 中冶南方工程技术有限公司 风口小套的拆卸机构及其拆卸方法
CN109022653A (zh) * 2017-06-12 2018-12-18 鞍钢股份有限公司 一种卸高炉风口的专用工具及使用方法
CN113403438A (zh) * 2021-05-10 2021-09-17 李旋 一种具有熔接面扭断功能的直筒型风口小套拆卸装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2280501B (en) * 1993-07-30 1996-10-23 Co Steel Sheerness Plc Burner mounting device
CN112370074B (zh) * 2020-10-31 2022-07-19 王敏 一种超声科探头自动清洗消毒设备

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1631872A (en) * 1925-04-25 1927-06-07 Knight Henry John Gear puller
US4724608A (en) * 1986-11-20 1988-02-16 Parrott Ronald J W Extractor tool for bearings, bushings and the like

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1244214B (de) * 1962-04-02 1967-07-13 Paul Wolf G M B H Vorrichtung zum Ausbau der loesbaren Blasformspitze aus dem in Hochoefenwaenden eingesetzten Kapellenrahmen
FR1542701A (fr) * 1967-09-05 1968-10-18 Yawata Iron & Steel Co Appareil pour le remplacement des tuyères
DE1955316A1 (de) * 1969-11-04 1971-05-06 Langenfeld Gmbh & Co Kg Maschf Vorrichtung zum Aus- und Einbauen von Blasduesen und Blasformen an Hochoefen
FR2233839A5 (en) * 1973-06-18 1975-01-10 Usinor Tuyere extn. on blast furnaces - using hydraulic extractor in adjustable mounting on a trolley
US4266907A (en) * 1977-07-28 1981-05-12 Paul Wurth, S.A. Device for handling the various components of an installation for the injection of pre-heated air into a shaft furnace
LU79865A1 (de) * 1977-07-29 1978-12-07

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1631872A (en) * 1925-04-25 1927-06-07 Knight Henry John Gear puller
US4724608A (en) * 1986-11-20 1988-02-16 Parrott Ronald J W Extractor tool for bearings, bushings and the like

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5333378A (en) * 1991-01-02 1994-08-02 Sjoebom Boerje Method for pulling bearings, a bearing puller and use thereof
US6141868A (en) * 1998-01-07 2000-11-07 Intri-Plex Technologies, Inc. Apparatus for press-in attachment of suspension assembly in hard disk drive
WO2008011694A1 (en) * 2006-07-24 2008-01-31 Gerdau Açominas S/A Tooling for changing tuyères and cooling boxes
US9486902B1 (en) * 2014-04-01 2016-11-08 Alexander K. Miller Tool for pulling impeller wear ring
CN106636512A (zh) * 2017-02-15 2017-05-10 中冶南方工程技术有限公司 风口小套拆卸机构及其拆卸方法
CN106636511A (zh) * 2017-02-15 2017-05-10 中冶南方工程技术有限公司 风口小套的拆卸机构及其拆卸方法
CN106636512B (zh) * 2017-02-15 2019-06-07 中冶南方工程技术有限公司 风口小套拆卸机构及其拆卸方法
CN106636511B (zh) * 2017-02-15 2019-06-07 中冶南方工程技术有限公司 风口小套的拆卸机构及其拆卸方法
CN109022653A (zh) * 2017-06-12 2018-12-18 鞍钢股份有限公司 一种卸高炉风口的专用工具及使用方法
CN113403438A (zh) * 2021-05-10 2021-09-17 李旋 一种具有熔接面扭断功能的直筒型风口小套拆卸装置

Also Published As

Publication number Publication date
BR9102778A (pt) 1992-02-04
EP0464419A2 (de) 1992-01-08
AU7943391A (en) 1992-01-02
DE69112509T2 (de) 1996-03-21
EP0464419A3 (en) 1992-08-05
AU639800B2 (en) 1993-08-05
ZA914578B (en) 1992-04-29
DE69112509D1 (de) 1995-10-05
EP0464419B1 (de) 1995-08-30
ATE127161T1 (de) 1995-09-15
CA2045915A1 (en) 1991-12-30
LU87758A1 (fr) 1992-01-15
ES2078996T3 (es) 1996-01-01
CA2045915C (en) 2002-03-12

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